SDAA082 August   2025 TLC69601-Q1 , TLC69604-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Long CCSI Daisy Chain Challenges
    1. 2.1 CCSI CLK_O Duty Cycle Increase Issues
    2. 2.2 CCSI Frequency Design Consideration
  6. 3TLC69699-Q1 Connectivity IC Design
    1. 3.1 CCSI Control on the CLK_O Duty Cycle and Data Rate
    2. 3.2 Optimized Fault Readback Scheme with FAULT Signal
    3. 3.3 TXFIFO Configuration
  7. 4Summary
  8. 5References

4 Summary

The TLC696xx-Q1 family has the CLK_O duty cycle increase behavior under 3.3V I/O voltage, so the minimum clock low time limits the maximum cascaded LED drivers. TLC69699-Q1 can help decrease the required CCSI frequency with CCSI duty cycle control, optimized fault-readback scheme, and TXFIFO features, which allows more cascaded TLC696xx-Q1 drivers in a single long daisy chain.